28022856 has 32 divisors (see below), whose sum is σ = 70424640. Its totient is φ = 9291968.

The previous prime is 28022837. The next prime is 28022861. The reversal of 28022856 is 65822082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1765 + ... + 7691.

It is an arithmetic number, because the mean of its divisors is an integer number (2200770).

Almost surely, 2^28022856 is an apocalyptic number.

It is an amenable number.

28022856 is an abundant number, since it is smaller than the sum of its proper divisors (42401784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28022856 is a wasteful number, since it uses less digits than its factorization.

28022856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133 (or 6129 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 28022856 is about 5293.6618705769. The cubic root of 28022856 is about 303.7414988561.

The spelling of 28022856 in words is "twenty-eight million, twenty-two thousand, eight hundred fifty-six".